Astronomy | Astrophysics Answers

The forces exerted between the Earth and the Moon...

A) are equal in magnitude and opposite in direction, since they are action reaction pairs.

(B) are larger on the Moon because the Earth is more massive and exerts a larger force

(C)are smaller on the Moon since the Earth is more massive and exerts a larger force

(D) are equal in magnitude and in the same direction, since they are action reaction pairs.

how much solar masses does the supermassive black hole of the milky way gain every year ?

how much sollar masses does milky way invdividual galactic center gain every year ?

The diurnal (daily) motion of the sun varies with the location of the observers. Draw the diurnal motion of the sun as view by the observers at the Equatorial region, 45° N and 75° N during summer, winter, and spring separately. Label the position of zenith, meridian, horizon, North pole on each diagram. State whether the sun can be observed or not from the locations for each season. Tabulate your answer. Explain the relation between the path of the diurnal motion of the sun and the length of day.

Which very intense meteor shower is taking place annually in December?

An astronaut working on the Moon tries to determine the gravitational constant G by throwing a Moon rock of mass m with a velocity of v vertically into the sky. The astronaut knows that the moon has a density p of 3340 kg/m^3 and a radius R of 1740 km.

(a) Show with (1) that the potential energy of the rock at height h above the surface is given by:

E=(-4πG/3)mp.R^3/(R+H)

(b) Next, show that the gravitational constant can be determined by:

G=(3/8π)×(v^2/‌pR^2)×[1-{R/(R+H)}]^-1

(c)What is the resulting G if the rock is thrown with 30 km/h and reaches 21.5 m?

Explain how pulsars are formed and the causes for behaviour pulsating behaviour.

how much distance milky way individual galactic center gravity effects to pull ?

how much light year distance can individual milky way galactic center pull a star

An object in our solar system has been discovered orbiting the Sun in a very long path that extends far past Pluto.